diff --git a/maths_delete.pyw b/maths_delete.pyw
index c418fd1..c4bade6 100644
--- a/maths_delete.pyw
+++ b/maths_delete.pyw
@@ -64,4 +64,10 @@ bt_fh.pack()
 bt_n.pack()
 bt_scipy.pack()
 bt_sympy.pack()
-bt_pandas.pack()
\ No newline at end of file
+bt_pandas.pack()
+
+
+# mainloop
+root.title('删除')
+root.geometry('200x200+400+100')
+root.mainloop()
\ No newline at end of file